100 Facts About Correlation

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Here’s a list of facts about correlation:

1. Definition: Correlation is a statistical measure that describes the degree to which two variables change together.
2. Range: Correlation values range from -1 to 1.
3. Positive Correlation: A correlation coefficient close to 1 indicates a positive correlation, meaning that as one variable increases, the other tends to increase as well.
4. Negative Correlation: A correlation coefficient close to -1 indicates a negative correlation, meaning that as one variable increases, the other tends to decrease.
5. Zero Correlation: A correlation coefficient close to 0 indicates little to no linear relationship between the variables.
6. Pearson Correlation Coefficient: Measures the linear relationship between two variables. It is the most commonly used correlation coefficient.
7. Spearman Rank Correlation Coefficient: Measures the strength and direction of the monotonic relationship between two variables.
8. Kendall Tau Correlation Coefficient: Similar to Spearman’s coefficient, it measures the strength and direction of a monotonic relationship.
9. Correlation is Not Causation: A common phrase emphasizing that a correlation between two variables does not imply a causal relationship.